Datasheet

bq24725A
SLUSAL0 –SEPTEMBER 2011 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
4.5 V ≤ V
VCC
≤ 24 V, 0°C ≤ T
J
≤ 125°C, typical values are at T
A
= 25°C, with respect to GND (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
HOST COMMUNICATION FAILURE
t
timeout
SMBus bus release timeout
(3)
25 35 ms
t
BOOT
Deglitch for watchdog reset signal 10 ms
Watchdog timeout period, ChargeOption() bit [14:13] = 01
(4)
35 44 53 s
t
WDI
Watchdog timeout period, ChargeOption() bit [14:13] = 10
(4)
70 88 105 s
Watchdog timeout period, ChargeOption() bit [14:13] = 11
(4)
(Default) 140 175 210 s
(3) Devices participating in a transfer will timeout when any clock low exceeds the 25ms minimum timeout period. Devices that have
detected a timeout condition must reset the communication no later than the 35ms maximum timeout period. Both a master and a slave
must adhere to the maximum value specified as it incorporates the cumulative stretch limit for both a master (10ms) and a slave (25ms).
(4) User can adjust threshold via SMBus ChargeOption() REG0x12.
Figure 4. SMBus Communication Timing Waveforms
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